package com.athuahua.spzx.interceptor;

import com.athuahua.spzx.utils.BaseContext;
import com.athuahua.spzx.properties.JwtProperties;
import com.athuahua.spzx.utils.JwtUtil;
import com.athuahua.spzx.utils.ResultCodeEnum;
import io.jsonwebtoken.Claims;
import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {

    @Resource
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {


        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getAdminTokenName());

        //2、校验令牌
        try {
           // log.info("------------------");
           // log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), token);
            Long empId = Long.valueOf(claims.get("userName").toString());
          //  log.info("当前员工id：{}", empId);

          //  log.info("设置ThreadLocal变量");
            //设置当前登录用户id
            BaseContext.setCurrentId(empId);

            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应208状态码
            response.setStatus(ResultCodeEnum.UNAUTHORIZED.getCode());
            response.getWriter().write(ResultCodeEnum.UNAUTHORIZED.getMessage());
            return false;
        }
    }




    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
       // log.info("清理ThreadLocal变量");
        // 清理 ThreadLocal 的值
        BaseContext.removeCurrentId();
       // log.info("------------------");
    }
}
